<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>列表渲染</title>
    <script src="../js/vue.js"></script>
</head>
<body>
    <div id="root">

        <!--遍历数组是用的最多的-->
        <h2>列表</h2>
        <input type="text" placeholder="请输入名字" v-model="keyword">
        <ul>
            <li v-for="(per,index) in filPerson" :key="per.id">
                {{per.name}}-{{per.age}}-{{per.sex}}
            </li>
        </ul>
    </div>
</body>

<!-- 用watch实现 -->
<!-- <script>
    new Vue({
        el:'#root',
        data:{
            keyword:'',
          person:[
            {id:'001',name:'马冬梅',age:18,sex:'女'},
            {id:'002',name:'周冬雨',age:19,sex:'女'},
            {id:'003',name:'周杰伦',age:20,sex:'男'},
            {id:'004',name:'温兆伦',age:22,sex:'男'},
          ],
          filPerson:[]
        },
        watch:{
            keyword:{
                //防止一开始没有数据显示
                immediate:true,
                //防止模板改变，所以要有个定义
                //!不能修改原数组
                handler(val){
                    this.filPerson=this.person.filter((p)=>{
                        return p.name.indexOf(val)  !== -1
                    })
                }
               
            }
        }
    })
</script> -->

<!--用computed实现-->
<script>
    new Vue({
        el:'#root',
        data:{
            keyword:'',
            person:[
              {id:'001',name:'马冬梅',age:18,sex:'女'},
              {id:'002',name:'周冬雨',age:19,sex:'女'},
              {id:'003',name:'周杰伦',age:20,sex:'男'},
              {id:'004',name:'温兆伦',age:22,sex:'男'},
            ],
        },
        computed:{
            filPerson(){
                return this.filPerson=this.person.filter((p)=>{
                    return p.name.indexOf(this.keyword)  !== -1
                })
            }
        }
    })
</script>

</html>